>> P.435
J14■TighteningtorqueofmountingboltsThestandardtighteningtorquevaluesforMountingHoledTypeHighRigidityCrossedRollerBearingsV,MountingHoledTypeSuperSlimCrossedRollerBearingsmountingboltsareshowninTable16.Whenmachinesorequipmentaresubjectedtoseverevibra-tion,shock,largefluctuatingload,ormomentload,theboltsshouldbetightenedwithatorque1.2to1.5timeshigherthanthestandardtorquevaluesshown.Ifthematingmembermaterialiscastironoralumi-num,reducethetighteningtorquedependingonthestrengthcharacteristicsofthematingmembermateri-al.Pleasedonottightenwithtoomuchtorqueasabnor-malfrictionaltorqueorshortlifemayoccur.■DoubleRowAngularContactRollerBearingWemanufactureDoubleRowAngularContactRollerBearingstoorder.Ifneeded,pleasecontactIKO.DoubleRowAngularContactRollerBearingshavealargenumberofcylindricalrollerswithalargecontactareawitharacewayandanexcellentloadcapability,betweentheinnerandouterringsarrangedinadou-blerowofraceways.Thisunderpinsevenhigherrigidi-tyandlowertorquethanHighRigidityTypeCrossedRollerBearingsV.Themountingholesinbothinnerandouterringsfacil-itateinstallationtoyourmachinesandequipment.Further,theintegratedstructure(nonsplit)construct-edinbothinnerandouterringscanavoidinstallationerrors,yieldingextra-high-rigidityandhigh-accuracyguidingperformancewithoutbeingaffectedbyotherperipheralstructuressuchashousingorpressureplate.Forlubrication,usethetwooilholesontheouterringoutersurfaceshowninFig.6.AbovevaluesareforCarbonsteelbolt(Strengthdivision12.9)Table16TighteningtorqueofmountingboltsBoltsizeTighteningtorqueN・mM2.5×0.45M3×0.5M4×0.7M5×0.8M8×1.250.581.74.07.932StructureofDouble-actingAngularRollerBearingOuterringSeparatorCylindricalrollerInnerringBDdRc1/8A-O-A'AA'OPCD1PCD2(Oilhole)Fig.7ManufacturingexampleTable17ExampleofmanufacturingdimensionsBoundarydimensionsmmBasicstaticloadratingC0NBasicdynamicloadratingCN160210350dDBrminPCD1PCD229538054035405022.52.518424038527035050516700031300072500060300108000235000InjctgreaseIjectreaseGreaseInjctgrease1Injectgrease2GreaseGreaseFig.6GreaseJCRBHVCRBFVCRB(C)CRBTCRBTFCRBS
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